"The paper discusses the concept of the term worker in European labour law, focusing on the decision of the Court of Justice of the European Union in the Matzak case. First, the facts that are essential to Mr Matzak's qualification as a worker are presented. In a second step, the part of the Court's decision which refers to the concept of ‘worker' is analysed. The third and main part deals in detail with the current discussion of the concept of the term ‘worker' in EU law. This analysis should make it possible to systemise the decisions of the Court. Finally, an attempt is made to classify the decision of the Court in the Matzak within its own case law and to assess its consequences for future decisions."

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